What did Einstein figure out to avoid the director's inspection?

/kloc-At the age of 0/7, Einstein was admitted to Zurich Institute of Technology, Switzerland. 2/kloc-graduated at the age of 0 and became a middle school teacher. Later, he went to the Swiss Federal Patent Office as Patent examiners. Patent examiners's works are simple and stylized. It takes him three or four hours a day, sometimes only one hour, to finish all the work in a day. However, the patent office stipulates that staff are not allowed to walk away or do other work casually. Einstein was not used to it, so he came up with an idea: put the book in the drawer to read. Once the director came over, he leaned down and pushed into the drawer, and the director could not be found. He kept studying physics and stuffed the calculated results into the drawer.